Spinal Manipulation and Neuromuscular Performance on Amateur Cyclists

Not Applicable

Withdrawn

• Conditions: Manual Therapies
• Interventions: Procedure: Spinal manipulative therapy; Other: Sham spinal manipulative therapy

• Registration Number: NCT03913546
• Lead Sponsor: University of Alcala

Brief Summary

The present study aims to assess the effects of spinal manipulation therapy on neuromuscular performance.

Detailed Description

The present study will follow a parallel, pre-post design. The aim will be to determine the acute effects of spinal manipulation therapy (SMT) on different neuromuscular properties of recreational cyclists. Specifically, the investigators will measure the maximum force production capacity and muscle activation of the knee extensors concomitantly during a maximal voluntary contraction, as well as the maximum and mean power attained during a Wingate cycling test (i.e., 30 seconds 'all out'). Participants will undergo the tests on two different occasions separated by at least 48 hours and a maximum of 2 weeks. The same tests will be conducted in both testing sessions, but participants will be randomly assigned into two groups (sham or actual SMT) immediately before the second testing session.

Study Timeline

• Study First Submitted: 2019-04-04
• Study First Submitted QC: 2019-04-10
• Study First Posted: 2019-04-12
• Study Start: 2022-06
• Primary Completion: 2022-07
• Study Completion: 2022-10
• Status Verified: 2024-05
• Last Update Submitted: 2024-05-10
• Last Update Posted: 2024-05-13

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: Male
• Target Recruitment: Not specified

Inclusion Criteria

• Will be recruited from three different local triathlon and cycling clubs.
• Will have to cycle at least 4 hours per week during the preceding 3 months, and to have a cycling experience greater than 2 years

Exclusion Criteria

• Having suffered an injury in the month before the study that precluded regular exercise practice
• Having suffered any type of spine injury before the study
• Having previously received Spinal Manipulation Therapy

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Actual spinal manipulation	Spinal manipulative therapy	Participants in the actual actual spinal manipulative therapy (SMT) group will be assessed through the Activator basic method. SMT will be performed with the Activator IV Adjusting Instrument (Activator Methods International, Phoenix, AZ) varying the force level depending on the adjusted segment.
Sham spinal manipulation	Sham spinal manipulative therapy	Participants in the 'sham' group will receive a sham mechanical thrust (force set at level 0) instead of an actual one. In the force level 0, no excursion of the stylus occurs, but the instrument produces the same clicking sound as in the actual SMT condition. Therefore, the subject does not distinguish between intervention or placebo.

Primary Outcome Measures

Name	Time	Method
Peak power	On the control session and on the intervention session (immediately after the sham or actual SMT procedure)	Peak power registered during a 30-second Wingate anaerobic cycling test
Voluntary activation	On the control session and on the intervention session (immediately after the sham or actual SMT procedure)	Electromyographic activity of the vastus lateralis muscle registered during an isometric maximal voluntary contraction of the knee extensors.
Mean power	On the control session and on the intervention session (immediately after the sham or actual SMT procedure)	Mean power registered during a 30-second Wingate anaerobic cycling test
Maximal force	On the control session and on the intervention session (immediately after the sham or actual SMT procedure)	Peak force registered during an isometric maximal voluntary contraction of the knee extensors.

Trial Locations

Locations (1)

University of Alcalá; 🇪🇸 Alcalá De Henares, Spain